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Measuring Terminal MT-40

Measuring terminal for measurement, monitoring, recording and analysis of power quality in the most demanding generation, distribution and transmission systems.

The MT-40 measuring terminal is designed for measurement, monitoring, recording and analysis of electrical quantities in the most demanding generation, distribution and transmission systems. Fast sampling computes true RMS currents, voltages, powers, energies, power factor and frequency, and analyses power quality per EN 50160 and IEC 61000-4-30 Class A (Ed.2 and Ed.3); it offers local EN 50160 display and remote monitoring via a built-in Web server.

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  • Power quality – Class A

    Analysis per EN 50160 and IEC 61000-4-30 Class A (Ed.2 & Ed.3): harmonics up to the 50th/63rd, THD, voltage dips and swells, RVC, flicker, transients and unbalance; local EN 50160 display on the device.

  • True RMS measurement

    True RMS measurement of currents, voltages, frequency, power and power factor; extended frequency range 2–150 kHz.

  • Energy metering by tariff

    Active and reactive energy (EP, EQ) metering by tariff, plus peak, average and minimum values with time stamping.

  • Recording & storage

    Flexible recording with storage on an SD card up to 32 GB; reports available by e-mail (.gif, .csv).

  • Communication & Web server

    10/100 Ethernet, two RS-232/RS-485 ports (optional optical) and a built-in Web server; MODBUS RTU/TCP, IEC 60870-5-101/103/104, IEC 61850 (option), FTP(S)/HTTP(S).

  • Monitoring, control & environment

    4(8) digital inputs and 4 digital outputs, 4 analog inputs and 2 analog outputs, plus 2 inputs for temperature and humidity measurement (STH-3 sensor).

Measurement inputs

Current inputs
4(8); 4×5 A + 4×333 mV; range 0–1.5 IN (option 0–20 IN); external CTs with 333 mV voltage output (option)
Voltage inputs
4 differential; 100–960 V (L-N); declared UDIN 50–480 V; range 0.1–2.0 UDIN; extended frequency range 2–150 kHz
Sampling
512 samples/cycle

Accuracy & analysis

Accuracy – voltage / current
U: 0.1% UDIN; I: 0.1% MV ± 0.02% FSR
Accuracy – power
P, Q, S, cos φ: 0.1% MV ± 0.02% FSR
Accuracy – energy
EP: EN 62053-22, class 0.1S; EQ: EN 62053-24, class 0.5S
Harmonics
up to the 50th/63rd harmonic; IEC 61000-4-7, class 1
Frequency
accuracy ± 10 mHz

Inputs & outputs

Digital inputs / outputs
4 (8 option) inputs; 4 relay outputs (220 V DC, 80 W, NO)
Analog inputs / outputs
4 inputs (4–20 mA, 0–10 V); 2 outputs (option)
Temperature & humidity measurement
2 inputs (STH-3 sensors)
Signalling
H1, H2 – multi-LED, programmable

Data & display

MD interval
1–30 min
Memory
SD card up to 32 GB
Display
colour graphic LCD, 320×240

Communication

Communication
10/100 Base-Tx(Fx) Ethernet; 2× RS-232/RS-485; optical GFO/PFO (option); USB 2.0; built-in Web server (HTML)
Protocols
MODBUS RTU/TCP; FTP(S); IEC 60870-5-101/103/104; IEC 61850 (option); HTTP(S)
Synchronisation
SNTP, GPS, NTP; synchrophasor IEEE C37.118-1/2 (option)

General

Power supply
230 V AC (+10/−20%); 24/48/110/220 V DC; UPS 10 s (option 30 min); consumption < 5 VA
Temperature range
0…+50 °C (extended −20…+60 °C)
Insulation
2.5 kV, 50 Hz, 1 min
Mounting & dimensions
35 mm DIN rail 144×93×95 mm or panel 180×106×95 mm
  • EN 50160
  • IEC 61000-4-30 Class A (Ed.2, Ed.3)
  • IEC 61000-4-7
  • IEC 61000-4-15
  • IEC 61000-3-6/7
  • IEC 61000-2-2 / 2-4 / 2-12
  • EN 62053-22 (class 0.1S) – active energy
  • EN 62053-24 (class 0.5S) – reactive energy
  • IEEE C37.118-1/2 (synchrophasor, option)
  • EMC: HRN EN 61000-4-2/3/4/5/6/8, EN 61326-1
  • MODBUS RTU/TCP, FTP(S), HTTP(S)
  • IEC 60870-5-101/103/104
  • IEC 61850 (option)
  • PQDIF, COMTRADE

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